///*
// * Licensed to the Apache Software Foundation (ASF) under one or more
// * contributor license agreements.  See the NOTICE file distributed with
// * this work for additional information regarding copyright ownership.
// * The ASF licenses this file to You under the Apache License, Version 2.0
// * (the "License"); you may not use this file except in compliance with
// * the License.  You may obtain a copy of the License at
// *
// *     http://www.apache.org/licenses/LICENSE-2.0
// *
// * Unless required by applicable law or agreed to in writing, software
// * distributed under the License is distributed on an "AS IS" BASIS,
// * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// * See the License for the specific language governing permissions and
// * limitations under the License.
// */
//
//package com.jl.cloud.commom.utils;
//
//import org.apache.rocketmq.client.apis.*;
//import org.apache.rocketmq.client.apis.producer.Producer;
//import org.apache.rocketmq.client.apis.producer.ProducerBuilder;
//import org.apache.rocketmq.client.apis.producer.TransactionChecker;
//
///**
// * Each client will establish an independent connection to the server node within a process.
// *
// * <p>In most cases, the singleton mode can meet the requirements of higher concurrency.
// * If multiple connections are desired, consider increasing the number of clients appropriately.
// */
//public class ProducerSingleton {
//    private static volatile Producer PRODUCER;
//    private static volatile Producer TRANSACTIONAL_PRODUCER;
//    private static final String ACCESS_KEY = "yourAccessKey";
//    private static final String SECRET_KEY = "yourSecretKey";
//    private static final String ENDPOINTS = "127.0.0.1:8094";
//
//    private ProducerSingleton() {
//    }
//
//    private static Producer buildProducer(TransactionChecker checker, String... topics) throws ClientException {
//        final ClientServiceProvider provider = ClientServiceProvider.loadService();
//        // Credential provider is optional for client configuration.
//        // This parameter is necessary only when the server ACL is enabled. Otherwise,
//        // it does not need to be set by default.
//        SessionCredentialsProvider sessionCredentialsProvider =
//            new StaticSessionCredentialsProvider(ACCESS_KEY, SECRET_KEY);
//        ClientConfiguration clientConfiguration = ClientConfiguration.newBuilder()
//            .setEndpoints(ENDPOINTS)
//            // On some Windows platforms, you may encounter SSL compatibility issues. Try turning off the SSL option in
//            // client configuration to solve the problem please if SSL is not essential.
//            // .enableSsl(false)
//            .setCredentialProvider(sessionCredentialsProvider)
//            .build();
//        final ProducerBuilder builder = provider.newProducerBuilder()
//            .setClientConfiguration(clientConfiguration)
//            // Set the topic name(s), which is optional but recommended. It makes producer could prefetch
//            // the topic route before message publishing.
//            .setTopics(topics);
//        if (checker != null) {
//            // Set the transaction checker.
//            builder.setTransactionChecker(checker);
//        }
//        return builder.build();
//    }
//
//    public static Producer getInstance(String... topics) throws ClientException {
//        if (null == PRODUCER) {
//            synchronized (ProducerSingleton.class) {
//                if (null == PRODUCER) {
//                    PRODUCER = buildProducer(null, topics);
//                }
//            }
//        }
//        return PRODUCER;
//    }
//
//    public static Producer getTransactionalInstance(TransactionChecker checker,
//        String... topics) throws ClientException {
//        if (null == TRANSACTIONAL_PRODUCER) {
//            synchronized (ProducerSingleton.class) {
//                if (null == TRANSACTIONAL_PRODUCER) {
//                    TRANSACTIONAL_PRODUCER = buildProducer(checker, topics);
//                }
//            }
//        }
//        return TRANSACTIONAL_PRODUCER;
//    }
//}
